Customer Service

Major League Baseball Auctions Customer Service representatives are available to assist you Monday through Friday, 9 AM - 6 PM EST. All weekend or holiday Customer Service requests will be administered on the next business day.

Customer Service Form

Your opinion matters and we'd love to hear it! To submit your comments and suggestions, please complete and submit our Customer Service form below. Your suggestions are appreciated and are used to improve our site.

If your question is in regard the MLB authentication program or the hologram that appears on your item please e-mail authentication@website.mlb.com or visit the MLB Authentication Home Page.

All fields marked *are required.

* First Name

* Last Name

* E-mail Address

Phone Number

Logon ID

Listing Number

Listing number can be found on the product detail page of each item. Click Here for more details.

The following are trademarks or service marks of Major League Baseball entities and may be used only with permission of Major League Baseball Properties, Inc. or the relevant Major League Baseball entity: Major League, Major League Baseball, MLB, the silhouetted batter logo, World Series, National League, American League, Division Series, League Championship Series, All-Star Game, and the names, nicknames, logos, uniform designs, color combinations, and slogans designating the Major League Baseball clubs and entities, and their respective mascots, events and exhibitions.